

function StringBuffer(){
	this.array = new Array();
	return this ;
}

StringBuffer.prototype.append = function(string){
	this.array[this.array.length] = string;
	return this;
}

StringBuffer.prototype.clear = function(string){
	this.array.length = 0;
}

StringBuffer.prototype.toString = function(string){
	var str = this.array.join("");
	return str;
}